The Arctic is often cited for a plethora of impacts resulting from anthropogenic climate change, including glacier retreat and reductions in floating sea ice, meltwater incursions changing ocean salinity, as well as sea level ...
It might look like a roll of chicken wire, but this tiny cylinder of carbon atoms—too small to see with the naked eye—could one day be used for making electronic devices ranging from night vision goggles and motion detectors ...
Nanomaterials
Mar 11, 2024
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167
The simplest possible molecule H2+ was one of the very first molecules to form in the cosmos. This makes it significant for astrophysics, but also an important object of research for fundamental physics. However, it is difficult ...
Optics & Photonics
Feb 27, 2024
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24
Star-shredding black holes are everywhere in the sky if you just know how to look for them. That's one message from a new study by MIT scientists, appearing today in The Astrophysical Journal.
Astronomy
Jan 29, 2024
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166
We know of Mars as the red planet, for its surface and atmosphere is caked in endless swirling dust of rusted iron, the rusting action provided by the always-eager oxygen. But this was not always so.
Astrobiology
Jan 24, 2024
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36
Our Milky Way bristles with giant molecular clouds birthing stars. Based on what we see here, astronomers assume that the process of star creation also goes on similarly in other galaxies. It makes sense since their stars ...
Astronomy
Dec 29, 2023
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118
NASA's new Multiband Uncooled Radiometer Instrument (MURI) features a novel bolometer that detects infrared radiation without a cryogenic cooler, greatly reducing the cost and complexity of dispatching infrared radiometers ...
Space Exploration
Dec 20, 2023
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3
High-frequency terahertz waves have great potential for a number of applications including next-generation medical imaging and communication. Researchers at Linköping University, Sweden, have shown, in a study published ...
Optics & Photonics
Dec 20, 2023
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53
Objects in space reveal different aspects of their composition and behavior at different wavelengths of light. Supernova remnant Cassiopeia A (Cas A) is one of the most well-studied objects in the Milky Way across the wavelength ...
Astronomy
Dec 11, 2023
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63
Physicists at the University of Duisburg-Essen and their cooperating partners have discovered that tiny graphene sheets can become electromagnets under infrared radiation. The study is published in the journal Nature Communications.
Nanophysics
Dec 4, 2023
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64
Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light (400-700 nm), but shorter than that of terahertz radiation (100 µm - 1 mm) and microwaves (~30,000 µm). Infrared radiation spans roughly three orders of magnitude (750 nm and 100 µm).
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared (47% share of the spectrum), visible (46%), and ultra-violet (only 6%) light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.
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